// Copyright (C) Kumo inc. and its affiliates.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//

package task

import (
	"bytes"
	"context"
	"fmt"
	"path"
	"path/filepath"

	"github.com/kumose/errors"
	"github.com/kumose/kmopt/pkg/cluster/ctxt"
)

// InstallPackage is used to copy all files related the specific version a component
// to the target directory of path
type InstallPackage struct {
	srcPath string
	host    string
	dstDir  string
}

// Execute implements the Task interface
func (c *InstallPackage) Execute(ctx context.Context) error {
	// Install package to remote server
	exec, found := ctxt.GetInner(ctx).GetExecutor(c.host)
	if !found {
		return ErrNoExecutor
	}

	dstDir := filepath.Join(c.dstDir, "bin")
	dstPath := filepath.Join(dstDir, path.Base(c.srcPath))

	err := exec.Transfer(ctx, c.srcPath, dstPath, false, 0, false)
	if err != nil {
		return errors.Annotatef(err, "failed to scp %s to %s:%s", c.srcPath, c.host, dstPath)
	}

	cmd := fmt.Sprintf(`tar --no-same-owner -zxf %s -C %s && rm %s`, dstPath, dstDir, dstPath)

	_, stderr, err := exec.Execute(ctx, cmd, false)
	if err != nil {
		if bytes.Contains(stderr, []byte("command not found")) {
			return errors.Errorf("tar command was not found on %s, please install it", c.host)
		}
		return errors.Annotatef(err, "stderr: %s", string(stderr))
	}
	return nil
}

// Rollback implements the Task interface
func (c *InstallPackage) Rollback(ctx context.Context) error {
	return ErrUnsupportedRollback
}

// String implements the fmt.Stringer interface
func (c *InstallPackage) String() string {
	return fmt.Sprintf("InstallPackage: srcPath=%s, remote=%s:%s", c.srcPath, c.host, c.dstDir)
}
